What values can you make using just the numbers of the year, in order, and the provided mathematical operations?
See if you can make every number from 1 to 30.
Click a button to add an operator tile, and then build up expressions by dragging the tiles on top of each other in the shaded area — the borders will turn red when combination is possible. (You can also drag two numbers together to join them.)
Click Save to store a copy of any complete expression in the box on the right.
(Note: The last button, with a shorter minus sign, is unary minus — for making negatives.)